Question

How to prove the variance of a function g(X) of the random variable X is given by $var[g(X)]\approx\{\frac{dg(X)}{dX}\}^2var(X)$

score 375 · Answer 1 · 2019-02-09 17:07:35

375

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How to prove the variance of a function g(X) of the random variable X is given by $var[g(X)]\approx\{\frac{dg(X)}{dX}\}^2var(X)$

Published on 09 Feb 2019 - 17:07

score 3.5k · Answer 2 · 2019-02-09 17:08:11

3.5k

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What is the largest possible variance of a random variable on $[0; 1]$?

Published on 09 Feb 2019 - 17:08

score 1.5k · Answer 3 · 2019-02-12 11:46:15

1.5k

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Variance of sum of weighted gaussian random variable

Published on 12 Feb 2019 - 11:46

score 51 · Answer 4 · 2026-03-25 17:45:03

51

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Partial permutation of time sequence data that keep order of events

Published on 25 Mar 2026 - 17:45

score 3.8k · Answer 5 · 2026-03-27 02:59:48

3.8k

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Formula to recalculate Variance after removing a value and adding another one given old variance

Published on 27 Mar 2026 - 2:59

score 36 · Answer 6 · 2026-03-26 08:02:29

36

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A random variable $X$ is number of boys out of $n$ children. Calculate $\operatorname{Var}(2X-n)$

Published on 26 Mar 2026 - 8:02

score 595 · Answer 7 · 2026-03-26 07:59:20

595

Views

Variance and mean of balls in bins limited capacity

Published on 26 Mar 2026 - 7:59

score 114 · Answer 8 · 2019-02-17 18:53:35

114

Views

Minimum variance of $k_1X+k_2Y$ where $X,Y$ are independent Poisson

Published on 17 Feb 2019 - 18:53

score 18 · Answer 9 · 2026-03-23 01:05:04

18

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$Y = \frac { K A ^ { 3 } } { ( B + D ) ( C - D ) }$

Published on 23 Mar 2026 - 1:05

score 1k · Answer 10 · 2026-03-25 21:48:53

1k

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We have an urn with 6 red balls and 4 green balls.

Published on 25 Mar 2026 - 21:48

score 21.2k · Answer 11 · 2019-02-21 22:55:28

21.2k

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Variance of sine and cosine of a random variable

Published on 21 Feb 2019 - 22:55

score 1.1k · Answer 12 · 2019-02-23 07:46:11

1.1k

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About Conditional Variance $X$ Has distribution $ U(0,1)$ and $Y$ has distribution $ U(0,X)$

Published on 23 Feb 2019 - 7:46

score 188 · Answer 13 · 2026-03-25 21:54:07

188

Views

How to show that the error variance of the best linear predictor is inferior to the proportional predictor?

Published on 25 Mar 2026 - 21:54

score 187 · Answer 14 · 2019-02-25 17:22:57

187

Views

Conditional Expectation of a Sum of Random Variables and a Random Integer

Published on 25 Feb 2019 - 17:22

score 87 · Answer 15 · 2026-03-25 19:25:35

87

Views

MLE : Effect of incorrect variance on the mean for a normal distribution

Published on 25 Mar 2026 - 19:25

List Question

How to prove the variance of a function g(X) of the random variable X is given by $var[g(X)]\approx\{\frac{dg(X)}{dX}\}^2var(X)$

What is the largest possible variance of a random variable on $[0; 1]$?

Variance of sum of weighted gaussian random variable

Partial permutation of time sequence data that keep order of events

Formula to recalculate Variance after removing a value and adding another one given old variance

A random variable $X$ is number of boys out of $n$ children. Calculate $\operatorname{Var}(2X-n)$

Variance and mean of balls in bins limited capacity

Minimum variance of $k_1X+k_2Y$ where $X,Y$ are independent Poisson

$Y = \frac { K A ^ { 3 } } { ( B + D ) ( C - D ) }$

We have an urn with 6 red balls and 4 green balls.

Variance of sine and cosine of a random variable

About Conditional Variance $X$ Has distribution $ U(0,1)$ and $Y$ has distribution $ U(0,X)$

How to show that the error variance of the best linear predictor is inferior to the proportional predictor?

Conditional Expectation of a Sum of Random Variables and a Random Integer

MLE : Effect of incorrect variance on the mean for a normal distribution

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